saga/seata-saga-engine/src/main/java/io/seata/saga/engine/expression/seq/SequenceExpressionFactory.java
/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package io.seata.saga.engine.expression.seq;

import io.seata.saga.engine.expression.Expression;
import io.seata.saga.engine.expression.ExpressionFactory;
import io.seata.saga.engine.sequence.SeqGenerator;
import org.springframework.util.StringUtils;

/**
 * Sequence expression factory
 *
 * @author lorne.cl
 */
public class SequenceExpressionFactory implements ExpressionFactory {

    private SeqGenerator seqGenerator;

    @Override
    public Expression createExpression(String expressionString) {

        SequenceExpression sequenceExpression = new SequenceExpression();
        sequenceExpression.setSeqGenerator(this.seqGenerator);
        if (StringUtils.hasLength(expressionString)) {
            String[] strings = expressionString.split("\\|");
            if (strings.length >= 2) {
                sequenceExpression.setEntity(strings[0]);
                sequenceExpression.setRule(strings[1]);
            }
        }
        return sequenceExpression;
    }

    public SeqGenerator getSeqGenerator() {
        return seqGenerator;
    }

    public void setSeqGenerator(SeqGenerator seqGenerator) {
        this.seqGenerator = seqGenerator;
    }
}